package com.vv.images;

import net.coobird.thumbnailator.Thumbnails;
import net.coobird.thumbnailator.geometry.Positions;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

/**
 * @Description
 * @Author xingchao
 * @Date 2021/2/4 17:41
 */
public class ReadImg {
    public static void main(String[] args) throws Exception {
        //  下载原图
        String url = "http://182.118.27.17/0/anaaAja7nINR.jpg?g=file.m.mvbox.cn";
        String tmpFile="src\\main\\resources\\static\\images\\pic2021.webp";
        String finalFile = "src\\main\\resources\\static\\images\\pic2021-1.webp";
        downLoadImg(url,tmpFile);
        BufferedImage image = ImageIO.read(new File(tmpFile));
        int imageWidth = image.getWidth();
        int imageHeitht = image.getHeight();

        int widthSize=200;
        int heightSize=200;
        if (imageWidth > imageHeitht){
            // 长
            Thumbnails.of(tmpFile)
//                    .height(heightSize)
                    .size(200,200)
                    .outputQuality(0.9f)
                    .outputFormat("webp")
                    .toFile(finalFile);
            Thumbnails.of(tmpFile)
                    .height(heightSize)
                    .outputQuality(0.9f)
                    .outputFormat("webp")
                    .toFile("src\\main\\resources\\static\\images\\pic2021-2.webp");
        }else{
            // 高
            Thumbnails.of(tmpFile)
                    .width(widthSize)
                    .outputQuality(0.9f)
                    .outputFormat("webp")
                    .toFile(finalFile);
        }

//        Thumbnails.of(finalFile)
//                .scale(1f)
//                .sourceRegion(Positions.CENTER,widthSize,heightSize)
//                .outputQuality(0.9f)
//                .toFile("src\\main\\resources\\static\\images\\pic2021-2.webp");
    }



    public static void downLoadImg(String imgUrl,String tmpFile) throws Exception {
        //new一个URL对象
        URL url = new URL(imgUrl);
        //打开链接
        HttpURLConnection conn = (HttpURLConnection)url.openConnection();
        //设置请求方式为"GET"
        conn.setRequestMethod("GET");
        //超时响应时间为5秒
        conn.setConnectTimeout(5 * 1000);
        //通过输入流获取图片数据
        InputStream inStream = conn.getInputStream();
        //得到图片的二进制数据，以二进制封装得到数据
        byte[] data = readInputStream(inStream);
        //new一个文件对象用来保存图片，默认保存当前工程根目录
        File imageFile = new File(tmpFile);
        //创建输出流
        FileOutputStream outStream = new FileOutputStream(imageFile);
        //写入数据
        outStream.write(data);
        //关闭输出流
        outStream.close();
    }
    public static byte[] readInputStream(InputStream inStream) throws Exception{
        ByteArrayOutputStream outStream = new ByteArrayOutputStream();
        //创建一个Buffer字符串
        byte[] buffer = new byte[1024];
        //每次读取的字符串长度，如果为-1，代表全部读取完毕
        int len = 0;
        //使用一个输入流从buffer里把数据读取出来
        while( (len=inStream.read(buffer)) != -1 ){
            //用输出流往buffer里写入数据，中间参数代表从哪个位置开始读，len代表读取的长度
            outStream.write(buffer, 0, len);
        }
        //关闭输入流
        inStream.close();
        //把outStream里的数据写入内存
        return outStream.toByteArray();
    }
}
